Drinking water quality · 2021
· Verified
What's in City of La Palma, CA tap water
35 contaminants were measured in the City of La Palma, CA water system's 2021 annual report. Each is shown below against its federal limit.
- Reporting year
- 2021
- Contaminants measured
- 35
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
state-level CCR
Approaching the limit (≥ 80%)
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Monitoring1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 9.5 ug/LAverageLocal Groundwater | None set | Approaching the limit |
+By source (2)— Local Groundwater, MWD Surface Water
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.15 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.00159 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.107 mg/LAverageMWD Surface Water | 2 mg/LMCL | Within the limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 140 ug/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 68 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| GermaniumA trace metalloid found in some source water. | 0.1 ug/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 25 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| ManganeseA naturally occurring metal from soil and rock. | 50 ug/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, MWD Surface Water
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 4.6 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| SodiumA naturally occurring salt component. | 98 ug/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.9 pCi/LAverageLocal Groundwater | 15 pCi/LMCL | Within the limit |
+By source (2)— Local Groundwater, MWD Surface Water
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 6 pCi/LAverageMWD Surface Water | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2 pCi/LAverageMWD Surface Water | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 18 ug/LAverageAverage Amount | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 7 ug/LAverageAverage Amount | None set | Within the limit |
| Bromodichloroacetic acidA brominated haloacetic acid disinfection byproduct. | 0.3 ug/LAverageAverage Amount | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.2 NTUAverageLocal Groundwater | 1 NTUMCL | Within the limit |
+By source (3)— Local Groundwater, Metropolitan Water District Diemer Filtration Plant, MWD Surface Water
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 178 mg/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, MWD Surface Water
| |||
| ColorA measure of visible tint in the water. | 5AverageAverage Amount | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 278 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| OdorA measure of detectable smell in the water. | 3AverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| pHA measure of how acidic or basic the water is. | 8.1AverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, MWD Surface Water
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 988AverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.5 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 628 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageMWD Surface Water | 4 mg/LMCL | Within the limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| Dibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.9 ug/LAverageAverage Amount | None set | Within the limit |
| Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct. | 0.7 ug/LAverageAverage Amount | None set | Within the limit |
| Chlorodibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.6 ug/LAverageAverage Amount | None set | Within the limit |
| Dichloroacetic acidA haloacetic acid disinfection byproduct. | 0.4 ug/LAverageAverage Amount | 0 ug/LMCLG | Within the limit |
| BromideA naturally occurring salt found in source water. | 0.05 mg/LAverageLocal Groundwater | None set | Detected — no federal limit |
| ChlorideA naturally occurring salt compound. | 101 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
| SulfateA naturally occurring mineral from rock and soil. | 221 mg/LAverageMWD Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD Surface Water, Local Groundwater
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.53 mg/LAverageAverage Amount | 4 mg/LMCL | Within the limit |
Source: City of La Palma, CA's 2021 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about City of La Palma, CA's water
+Is City of La Palma, CA tap water safe to drink in 2021?
Every one of the 35 contaminants measured in City of La Palma, CA's 2021 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in City of La Palma, CA tap water?
35 contaminants were measured in City of La Palma, CA's 2021 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in City of La Palma, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Arsenic. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from City of La Palma, CA's 2021 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is City of La Palma, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2021 report; a new report will replace it once the utility publishes its next annual update.
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